Portersville, PA Weather & Growing Conditions
Tonight
63°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before midnight, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 74% |
| Sunday | 75°F | Showers And Thunderstorms | 5 to 8 mph W | 97% |
| Sunday Night | 52°F | Chance Showers And Thunderstorms | 8 mph N | 27% |
| Monday | 68°F | Slight Chance Rain Showers | 9 mph NE | 21% |
| Monday Night | 52°F | Chance Rain Showers | 8 to 13 mph E | 45% |
| Tuesday | 64°F | Chance Rain Showers | 14 mph E | 51% |
| Tuesday Night | 51°F | Rain Showers Likely | 15 mph E | 70% |
| Wednesday | 62°F | Rain Showers Likely | 15 mph E | 70% |
| Wednesday Night | 50°F | Chance Rain Showers | 14 mph E | 53% |
| Thursday | 64°F | Chance Rain Showers | 8 to 12 mph E | 53% |
| Thursday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph E | 15% |
| Friday | 69°F | Partly Sunny | 7 mph NE | 13% |
| Friday Night | 48°F | Partly Cloudy | 6 mph NE | 11% |
| Saturday | 70°F | Mostly Sunny | 5 to 8 mph N | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portersville, PA
Last spring frost
May 7
First fall frost
Oct 14
Growing season
158 days
Hardiness zone
6a
Explore more for Portersville, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Slippery Rock 1 Ssw, Pa (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.